ken long wrote:
Tim Gillett wrote: in her setup the tape is lubricated as it travels across the stationary repro head.
As I mentioned the record head has been replaced with a felt pad connected to an IV drip. This is where the tape is lubricated in her system. I find it more practical and just as effective to apply as the tape unwinds. It usually evaporates before the playback head. IME, any residue remaining on the tape at that stage can really affect the frequency response and later, in the case of some machines, the oil in the pinch roller. I'd also add that some sticktion happens before the head block.
Yes I'm aware the tape is lubricated at the place where the record head used to be. That's why when it scrapes against the repro head, it is already lubricated, and only for that purpose, for Immediately the tape leaves the repro head, the lubrication is wiped off.
Yes there is a risk of "spacing loss" at the repro head/tape interface but as I understand it, that's the tradeoff at that point: stiction vs spacing loss. My understanding is that for such stiction problem tapes we also try to reduce the chances for stiction to the bare minimum, by removing all stationary points for the tape to scrape against (such as erase and record heads and non rotating guides), except the one we cant do without: the repro head.
Ed: James I bought some Cyclomethicone some time ago but I haven't had a stiction problem tape since which might benefit from it.